RFC 1918 response

Stephane Bortzmeyer bortzmeyer at nic.fr
Thu Jul 26 03:11:08 UTC 2007

On Wed, Jul 25, 2007 at 09:35:45PM -0500,
 Chris <cpollock at embarqmail.com> wrote 
 a message of 16 lines which said:

> Apologies for the dumb question if this is in fact one.

Well, it is a FAQist question :-)

Q: What does "RFC 1918 response from Internet for" mean?

A: If the IN-ADDR.ARPA name covered refers to a internal address space you are
   using then you have failed to follow RFC 1918 usage rules and are leaking
   queries to the Internet. You should establish your own zones for these
   addresses to prevent you querying the Internet's name servers for these
   addresses. Please see http://as112.net/ for details of the problems you are
   causing and the counter measures that have had to be deployed.

   If you are not using these private addresses then a client has queried for
   them. You can just ignore the messages, get the offending client to stop
   sending you these messages as they are most probably leaking them or setup your
   own zones empty zones to serve answers to these queries.

   zone "10.IN-ADDR.ARPA" {
           type master;
           file "empty";

   zone "16.172.IN-ADDR.ARPA" {
           type master;
           file "empty";


   zone "31.172.IN-ADDR.ARPA" {
           type master;
           file "empty";

   zone "168.192.IN-ADDR.ARPA" {
           type master;
           file "empty";

   @ 10800 IN SOA <name-of-server>. <contact-email>. (
                  1 3600 1200 604800 10800 )
   @ 10800 IN NS <name-of-server>.


   Future versions of named are likely to do this automatically.

More information about the bind-users mailing list